메타데이터
| 항목 |
값 |
| Designation |
P/2022 R4 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-07-10T09:08:14.683200Z |
| Orbit solution date (soln_date, UTC) |
2022-12-08T23:43:20Z |
| Obs used |
44 |
| NEO |
- |
| M1 |
18.500 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-09-02T13:50:22.128000Z |
| Discovery magnitude (MPC) |
21.38 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2022-10-02.0000000 |
| e |
0.49035777 |
| q (au) |
1.955577 |
| a (au) |
3.837156 |
| i (deg) |
21.021791 |
| Ω (om, deg) |
176.624038 |
| ω (w, deg) |
197.431178 |
| M (ma, deg) |
10.964688 |
밝기
산란 + 전체 선형
$$
M_a = (18.847 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
18.847 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
0.800 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
13:15:29.11 |
+00:20:23.6 |
HIP 64575 |
22.28 |
| 2026-09-20 12:00 |
13:15:49.77 |
+00:18:32.6 |
HIP 64575 |
26.27 |
| 2026-09-21 00:00 |
13:16:10.48 |
+00:16:41.7 |
HIP 64575 |
30.74 |
| 2026-09-21 12:00 |
13:16:31.22 |
+00:14:50.8 |
HIP 64575 |
35.51 |
| 2026-09-22 00:00 |
13:16:52.01 |
+00:13:00.0 |
HIP 64960 |
35.19 |
| 2026-09-22 12:00 |
13:17:12.83 |
+00:11:09.1 |
HIP 64960 |
31.85 |
| 2026-09-23 00:00 |
13:17:33.70 |
+00:09:18.4 |
HIP 64980 |
27.15 |
| 2026-09-23 12:00 |
13:17:54.60 |
+00:07:27.7 |
HIP 64980 |
21.81 |
| 2026-09-24 00:00 |
13:18:15.53 |
+00:05:37.2 |
HIP 64980 |
16.60 |
| 2026-09-24 12:00 |
13:18:36.51 |
+00:03:46.7 |
HIP 64980 |
11.70 |
| 2026-09-25 00:00 |
13:18:57.52 |
+00:01:56.2 |
HIP 64980 |
7.74 |
| 2026-09-25 12:00 |
13:19:18.57 |
+00:00:05.9 |
HIP 64980 |
6.71 |
| 2026-09-26 00:00 |
13:19:39.65 |
-00:01:44.3 |
HIP 64980 |
9.62 |
| 2026-09-26 12:00 |
13:20:00.77 |
-00:03:34.5 |
HIP 64980 |
14.23 |
| 2026-09-27 00:00 |
13:20:21.92 |
-00:05:24.5 |
HIP 64980 |
19.37 |
| 2026-09-27 12:00 |
13:20:43.11 |
-00:07:14.4 |
HIP 65238 |
21.40 |
| 2026-09-28 00:00 |
13:21:04.33 |
-00:09:04.3 |
HIP 65238 |
16.63 |
| 2026-09-28 12:00 |
13:21:25.58 |
-00:10:54.0 |
HIP 65238 |
12.56 |
| 2026-09-29 00:00 |
13:21:46.87 |
-00:12:43.6 |
HIP 65238 |
10.11 |
| 2026-09-29 12:00 |
13:22:08.18 |
-00:14:33.1 |
HIP 65238 |
10.48 |
| 2026-09-30 00:00 |
13:22:29.53 |
-00:16:22.4 |
HIP 65238 |
13.46 |
| 2026-09-30 12:00 |
13:22:50.91 |
-00:18:11.6 |
HIP 65261 |
17.43 |
| 2026-10-01 00:00 |
13:23:12.32 |
-00:20:00.7 |
HIP 65406 |
17.21 |
| 2026-10-01 12:00 |
13:23:33.76 |
-00:21:49.7 |
HIP 65406 |
12.16 |
| 2026-10-02 00:00 |
13:23:55.23 |
-00:23:38.5 |
HIP 65406 |
7.98 |
| 2026-10-02 12:00 |
13:24:16.73 |
-00:25:27.1 |
HIP 65406 |
6.59 |
| 2026-10-03 00:00 |
13:24:38.26 |
-00:27:15.7 |
HIP 65406 |
9.36 |
| 2026-10-03 12:00 |
13:24:59.81 |
-00:29:04.0 |
HIP 65514 |
11.42 |
| 2026-10-04 00:00 |
13:25:21.40 |
-00:30:52.2 |
HIP 65514 |
6.91 |
| 2026-10-04 12:00 |
13:25:43.01 |
-00:32:40.2 |
HIP 65514 |
5.45 |
| 2026-10-05 00:00 |
13:26:04.64 |
-00:34:28.0 |
HIP 65514 |
8.75 |
| 2026-10-05 12:00 |
13:26:26.30 |
-00:36:15.7 |
HIP 65514 |
13.73 |
| 2026-10-06 00:00 |
13:26:47.99 |
-00:38:03.2 |
HIP 65514 |
19.12 |
| 2026-10-06 12:00 |
13:27:09.70 |
-00:39:50.4 |
HIP 65708 |
20.17 |
| 2026-10-07 00:00 |
13:27:31.44 |
-00:41:37.5 |
HIP 65708 |
14.66 |
| 2026-10-07 12:00 |
13:27:53.20 |
-00:43:24.4 |
HIP 65708 |
9.41 |
| 2026-10-08 00:00 |
13:28:14.98 |
-00:45:11.1 |
HIP 65708 |
5.25 |
| 2026-10-08 12:00 |
13:28:36.78 |
-00:46:57.6 |
HIP 65708 |
5.68 |
| 2026-10-09 00:00 |
13:28:58.61 |
-00:48:43.8 |
HIP 65708 |
10.14 |
| 2026-10-09 12:00 |
13:29:20.45 |
-00:50:29.8 |
HIP 65708 |
15.47 |
| 2026-10-10 00:00 |
13:29:42.32 |
-00:52:15.6 |
HIP 65708 |
21.02 |
| 2026-10-10 12:00 |
13:30:04.20 |
-00:54:01.2 |
HIP 65708 |
26.66 |
| 2026-10-11 00:00 |
13:30:26.11 |
-00:55:46.5 |
HIP 65987 |
27.10 |